JPS63191926A - Weight display stabilizer - Google Patents

Abstract

PURPOSE:To make a weight display easy to read by outputting a mean value which is reduced in variation in weighing data by a sequence part when a balance detection part decides that balance is held continuously >=(N+1) times. CONSTITUTION:The balance detection part 8 inputs weighing data at every repetitive period to detect a primary balance state where a balance state continues N times and a secondary balance state where the balance state continue >=(N+1) times. The sequence part 9 outputs the latest weighing data as display data until the primary balance state is entered. Then when the primary balance state is entered, the latest data is employed as the display data and written in a memory 6. When the secondary state is entered, the mean value calculated from the latest weighed value and the weighed value in the memory are employed as the display data and the contents of the memory 16 are updated to the mean value. Consequently, variation in display weighed value is minimized and the weight display is made easy to read.

Description

DETAILED DESCRIPTION OF THE INVENTION Field of Industrial Application The present invention relates to an electronic scale that digitally displays weight values.

Prior Art A conventional electronic scale is constructed as shown in FIG. When the value detected by the load cell 1 is digitally displayed as a numerical value on the display device 2, amplification 2! The output voltage of the load cell 1 is applied to the unknown voltage input terminal of the A/D converter 5 via i3 and the low-pass filter 4, and the A/D
The converter 5 takes in the voltage of the unknown voltage input terminal at regular repetition intervals, converts it into digital data, and outputs the weight data Wa, which is supplied to the display device 2.

Problems to be Solved by the Invention In such a conventional configuration, since the latest quadruple data digitally converted by the A/D converter 5 is displayed on the display device 2, the external Due to factors such as wind and vibration, and the inherent internal noise of the circuit elements, the displayed weight value changes in small increments, making it difficult for the user to read the displayed critical value. be.

One object of the present invention is to provide a weight display stabilizing device that can display a weight value that is easy to read even if the latest weighing data Wo changes little by little.

Means for Solving the Problems The weight display stabilizing device of the present invention determines the balance state by taking in weighing data at every constant repetition cycle, and determines the first balance state in which the balance state continues N times,
A balance detection unit that detects when the secondary balance state has been reached consecutively (N+1) times or more, and the latest weighing data when the balance detection unit is not in either the first or second balance state. is output as display data, and when the balance detection section detects the first balance state, it outputs the latest weight data as display data and stores the latest weight data in memory, and the balance detection section detects the first balance state. When a secondary balance state is detected, an average value calculated based on the latest weight value and past weight values stored in the memory is output as display data, and the memory is updated to the average value. A sequence section is provided.

According to this configuration, during the period until the balance detection section determines that balance has been achieved continuously for (N+1) times or more, the sequence section outputs the latest weighing -f-t as it is to the display g position, During the period after the balance detection section determines that the weighing has been carried out continuously for at least (N-)-1) times, the sequence section outputs to the display device an average value with small fluctuations in the weighing data reduced.

EXAMPLE Hereinafter, an example of the present invention will be described based on gli 1 to 6. Components having the same functions as those in FIG. 7 showing the conventional example are given the same reference numerals and their explanations will be omitted.

FIG. 2 shows that the weight display stabilizing device 7 of the present invention is connected to an A/D converter 5.
It shows an electronic scale interposed between the and display device @2. As shown in FIG. 1, the weight display stabilizing device 7 includes a balance detecting section 8 that detects the balance state of the weight data Wo that the A/D converter 5 outputs at regular repetition intervals and detects changes in the balance state. and weighing data W output to the display device 2 based on the determination of the balance detection unit 8.
It is composed of a sequence section 9 that determines oo.

There is.

The balance detection section 8 is configured as follows.

WoN, the value of the car represented by the current weighing data Wa,
The II value represented by the it pm data Wo for the it times is W
If O(N-〇, then WON+≧WO(N-1)≧WON -K-■ However,
± is within the tolerance range for balance, and is usually set to a small value for the second or third time. If the first equation above is satisfied, it is determined that the U-balance has been achieved, and the state that satisfies the first equation occurs N = 2 consecutive times [first When the next balanced state) is detected, the first output BΩ1 is inverted to the logic level "I-1", and when (N+1) = 3 or more consecutive times (secondary balanced state) is detected, the first output Bρ1 is logic level 111
Returns to I+, and second output BA2 becomes logic level “H”
to be reversed. Note that until N = 2 consecutive times are detected,
The first and second outputs Bρ1.8λ2 are both at logic level "L".

Next, the first and second outputs Bρ1. The configuration and operation of the sequence section 9 in each state of BΩ2 will be explained in detail.

Until the balance detection unit 8 detects N=2 consecutive times,
When the first and second outputs Bρ1.8Ω2 are at the logic level “L”, the gates 10 and 11 of the sequence section 9 are turned off and the gate 12 is turned on, as shown in FIG. The data Wo is directly output as weighing data Wo_a to the display device 2 via the gates 13 and 14.

The balance detection unit 8 detects the first balance state, and the first output Bρ1 becomes the logic level "HtT", and the second output B
When Ω2 reaches the logic level ''L11, as shown in FIG. 4, the gate 10 of the sequence section 9 is turned on, the gate 11 is turned off, and the gate 12 is turned on, and the latest weighing data Wo is transferred to the gate 13. The weighing data Wo is directly output to the display device 2 via the gate 14 as weighing data Woo, and the latest weighing data Wo is input to the memory 1G via the gate 15.

The balance detection unit 8 detects the second balance state, and the first output Bρ1 is at the logic level “L” and the second output Bρ
2 becomes the logical level "H", the gate 10 of the sequence section 9 is turned off, the gate 11 is turned on, the gate 12 is turned off, and the gate 17 is turned on, and in the adder 18, the above-mentioned Weight value WO represented by the previous weight data Wo written in the memory 16 (N- latest weight data W).

Add the weighed value WON expressed as and add this to j calculator 1
The weight data Wo N +WO (N-li/2), which is halved by 9, is output to the display device 2 as weight data Wo o through the weight data gate 17.14. Wo N + WO(
The weighing data is updated to represent N-D/2.

Because of this configuration, the weighing data Wo is as shown in Fig. 6 (a
), the l value satisfies the first equation at G2 to Gtt, but no longer satisfies the first equation at the weighed value Gt2. As shown in Figure 6(b), the weight value is continuous in the period G2-G12 [balanced state is detected, and as shown in Figure 6(c)]
(d) As shown, the first and second outputs Bρ1. The logic level of Bρ2 changes, and the weight display on the display device 2 changes as shown in Fig. 6 (
It changes as shown by the solid line 20 in e). The virtual line 21 in FIG. 6(e) is similar to the conventional electronic scale shown in FIG.
Regardless of the balance status, the weighing data WO remains unchanged.
o.

It shows the variation in weight display when , in the electronic scale shown in FIG. 7 which is not provided with the weight display stabilization V device 7, the display device 2 displays ff over two digits, the smallest digit and the upper digit.
Even if the 1ffi value changes, the electronic scale shown in Fig. 2 equipped with the weight display stabilizing device 7 can suppress the change in the displayed weight value to the minimum digit.
The weight display is easier to read than before, improving usability.

In the above embodiment, the balance state was determined using the first equation, but this can also be similarly determined using the second equation below.

WO (N −1) + K ≧ WON ≧ W
O(N -1) K- ■Effects of the Invention As described above, according to the present invention, the balance detection section
1) During the period until it is determined that balance has been achieved continuously for at least 1) times, the sequence section outputs the latest weighing data as is to the display device, and the balance detection section outputs the latest weighing data as is (N+
1) During the period after it is determined that the weighing data has been repeated continuously, the sequence unit is configured to output an average value with reduced small fluctuations in the weighing data to the display device, so the displayed weight value will not be displayed as before. Even in cases where the weight value changes in small increments over two digits, the smallest digit and the digit above it, by installing this weight display stabilizing device on the input side of the display device, the displayed weight value can be changed only by the smallest digit. This makes it easier to read the weight display than before.
This can improve the usability of electronic scales.

[Brief explanation of the drawing]

Fig. 1 is a block diagram of an embodiment of the weight display stabilizing device of the present invention, Fig. 2 is a block diagram of an electronic scale equipped with the same device, and Fig. 3 is a block diagram of an embodiment of the weight display stabilizing device of the present invention.
Figures 6 to 5 are explanatory diagrams of the operation of the device in each state.
The figure is an explanatory diagram of the reduced state of display fluctuation in Figure 2, and Figure 7.
The figure is a configuration diagram of a conventional electronic scale. 5... A/D converter, 7... Weight display stabilizer, 8
... Balance detection section, 9... Sequence section. Agent Yoshihiro Morimoto Figure 1 Figure 2 Figure 7

Claims (1)

[Claims] 1. The balance state is determined by importing weighing data at a constant repetition period, and the balance state is a first balance state that has continued for N times, and a second balance state that has continued for (N+1) or more times. a balance detection section that detects the balance state; and a balance detection section that outputs the latest weighing data as display data when the balance detection section is not in either the first or second balance state;
When the next balance state is detected, the latest weighing data is output as display data and the latest weighing data is stored in the memory, and when the balance detecting section detects the second balance state, it outputs the latest weight data as display data. A weight display stabilizing device comprising: a sequence unit that outputs an average value calculated based on past weight values stored in the memory as display data and updates the memory to the average value.